Pulse wave detecting apparatus
US5119822A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1990 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Apr 13, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/02108
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pulse wave detecting apparatus including a pulse wave sensor; a pressing device for pressing the sensor against an arterial vessel of a subject, while varying the pressing force; a first device for determining an amplitude of each of pulses of pulse wave which are detected by the sensor while the pressing force is varied; a second device for determining, based on the determined pulse amplitudes, a first range of the pressing force within which the pulse amplitudes are generally constant, the first range including a point at which a rate of change of the pulse amplitudes with respect to the pressing force is zero; a third device for determining a minimum value of each of the pulses detected by the sensor; a fourth device for determining, based on the determined pulse minimum magnitude, a second range of the pressing force within which the pulse minimum magnitudes are generally constant, the second range including a point at which a rate of change of the pulse minimum magnitudes with respect to the pressing force is minimum; a fifth device for determining an optimum range of the pressing force based on the first and second ranges, and determining an optimum value of the pressing fo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.